Of utmost importance: it fixes CVE 2014-0016.
Thanks to jgw (Jeff W) _AT_ sdf.org for working on the same patch
independently.
In before the freeze! Changelog follows.
Security bugfixes
Added PRNG state update in fork threading (CVE-2014-0016).
New global configuration file defaults
Default "fips" option value is now "no", as FIPS mode is only helpful for compliance, and never for actual security.
Default "pid" is now "", i.e. not to create a pid file at startup.
New service-level configuration file defaults
Default "ciphers" updated to "HIGH:MEDIUM:+3DES:+DH:!aNULL:!SSLv2" due to AlFBPPS attack and bad performance of DH ciphersuites.
Default "libwrap" setting is now "no" to improve performance.
New features
OpenSSL DLLs updated to version 1.0.1f.
zlib DLL updated to version 1.2.8.
autoconf scripts upgraded to version 2.69.
TLS 1.1 and TLS 1.2 are now allowed in the FIPS mode.
New service-level option "redirect" to redirect SSL client connections on authentication failures instead of rejecting them.
New global "engineDefault" configuration file option to control which OpenSSL tasks are delegated to the current engine. Available tasks: ALL, RSA, DSA, ECDH, ECDSA, DH, RAND, CIPHERS, DIGESTS, PKEY, PKEY_CRYPTO, PKEY_ASN1.
New service-level configuration file option "engineId" to select the engine by identifier, e.g. "engineId = capi".
New global configuration file option "log" to control whether to append (the default), or to overwrite log file while (re)opening.
Different taskbar icon colors to indicate the service state.
New global configuration file options "iconIdle", "iconActive", and "iconError" to select status icon on GUI taskbar.
Removed the limit of 63 stunnel.conf sections on Win32 platform.
Installation of a sample certificate was moved to a separate "cert" target in order to allow unattended (e.g. scripted) installations.
Reduced length of the logged thread identifier. It is still based on the OS thread ID, and thus not unique over long periods of time.
Improved readability of error messages printed when stunnel refuses to start due to a critical error.
Bugfixes
LD_PRELOAD Solaris compatibility bug fixed (thx to Norm Jacobs).
CRYPTO_NUM_LOCKS replaced with CRYPTO_num_locks() to improve binary compatibility with diverse builds of OpenSSL (thx to Norm Jacobs).
Corrected round-robin failover behavior under heavy load.
Numerous fixes in the engine support code.
On Win32 platform .rnd file moved from c:\ to the stunnel folder.
- Fixed a regression bug introduced in version 4.55 causing random
crashes on several platforms, including Windows 7.
- Fixed incorrect "stunnel -exit" process synchronisation.
- Fixed FIPS detection with new versions of the OpenSSL library.
- Failure to open the log file at startup is no longer ignored.
Changelog:
Version 4.55, 2013.03.03, urgency: HIGH:
Security bugfix
OpenSSL updated to version 1.0.1e in Win32/Android builds.
Buffer overflow vulnerability fixed in the NTLM authentication of the CONNECT protocol negotiation. See https://www.stunnel.org/CVE-2013-1762.html for details.
New features
SNI wildcard matching in server mode.
Terminal version of stunnel (tstunnel.exe) build for Win32.
Bugfixes
Fixed write half-close handling in the transfer() function (thx to Dustin Lundquist).
Fixed EAGAIN error handling in the transfer() function (thx to Jan Bee).
Restored default signal handlers before execvp() (thx to Michael Weiser).
Fixed memory leaks in protocol negotiation (thx to Arthur Mesh).
Fixed a file descriptor leak during configuration file reload (thx to Arthur Mesh).
Closed SSL sockets were removed from the the transfer() c->fds poll.
Minor fix in handling exotic inetd-mode configurations.
WCE compilation fixes.
IPv6 compilation fix in protocol.c.
Windows installer fixes.
New Win32 features
FIPS module updated to version 2.0.
OpenSSL DLLs updated to version 1.0.1c.
zlib DLL updated to version 1.2.7.
Engine DLLs added: 4758cca, aep, atalla, capi, chil, cswift, gmp, gost, nuron, padlock, sureware, ubsec.
Other new features
"session" option renamed to more readable "sessionCacheTimeout". The old name remains accepted for backward compatibility.
New service-level "sessionCacheSize" option to control session cache size.
New service-level option "reset" to control whether TCP RST flag is used to indicate errors. The default value is "reset = yes".
New service-level option "renegotiation" to disable SSL renegotiation. This feature is based on a public-domain patch by Janusz Dziemidowicz.
New FreeBSD socket options: IP_FREEBIND, IP_BINDANY, IPV6_BINDANY (thx to Janusz Dziemidowicz).
New parameters to configure TLS v1.1/v1.2 with OpenSSL version 1.0.1 or higher (thx to Henrik Riomar).
Bugfixes
Fixed "Application Failed to Initialize Properly (0xc0150002)" error.
Fixed missing SSL state debug log entries.
Fixed a race condition in libwrap code resulting in random stalls (thx to Andrew Skalski).
Session cache purged at configuration file reload to reduce memory leak. Remaining leak of a few kilobytes per section is yet to be fixed.
Fixed regression bug in "transparent = destination" functionality (thx to Stefan Lauterbach). This bug was introduced in stunnel 4.51.
"transparent = destination" is now a valid endpoint in inetd mode.
"delay = yes" fixed to work even if specified *after* "connect" option.
Multiple "connect" targets fixed to also work with delayed resolver.
The number of resolver retries of EAI_AGAIN error has been limited to 3 in order to prevent infinite loops.
Fix some directory owner/group rights and take over maintainership as I
use it almost daily.
Changelog:
Version 4.53, 2012.03.19, urgency: MEDIUM:
* New features
- Added client-mode "sni" option to directly control the value of
TLS Server Name Indication (RFC 3546) extension.
- Added support for IP_FREEBIND socket option with a pached Linux kernel.
- Glibc-specific dynamic allocation tuning was applied to help unused memory
deallocation.
- Non-blocking OCSP implementation.
* Bugfixes
- Compilation fixes for old versions of OpenSSL (tested against 0.9.6).
- Usage of uninitialized variables fixed in exec+connect services.
- Occasional logging subsystem crash with exec+connect services.
- OpenBSD compilation fix (thx to Michele Orru').
- Session id context initialized with session name rather than a constant.
- Fixed handling of a rare inetd mode use case, where either stdin or stdout
is a socket, but not both of them at the same time.
- Fixed missing OPENSSL_Applink http://www.openssl.org/support/faq.html#PROG2
- Fixed crash on termination with FORK threading model.
- Fixed dead canary after configuration reload with open connections.
- Fixed missing file descriptors passed to local mode processes.
- Fixed required jmp_buf alignment on Itanium platform.
- Removed creating /dev/zero in the chroot jail on Solaris platform.
- Fixed detection of WSAECONNREFUSED Winsock error.
- Missing Microsoft.VC90.CRT.manifest added to Windows installer.
Version 4.52, 2012.01.12, urgency: MEDIUM:
* Bugfixes
- Fixed write closure notification for non-socket file descriptors.
- Removed a line logged to stderr in inetd mode.
- Fixed "Socket operation on non-socket" error in inetd mode on Mac OS X
platform.
- Removed direct access to the fields of the X509_STORE_CTX data structure.
Version 4.51, 2012.01.09, urgency: MEDIUM:
* New features
- Updated Win32 binary distribution OpenSSL DLLs to version 0.9.8s-fips.
- Updated Android binary OpenSSL to version 1.0.0f.
- Zlib support added to Win32 and Android binary builds.
- New "compression = deflate" global option to enable RFC 2246 compresion.
For compatibility with previous versions "compression = zlib" and
"compression = rle" also enable the deflate (RFC 2246) compression.
- Separate default ciphers and sslVersion for "fips = yes" and "fips = no".
- UAC support for editing configuration file with Windows GUI.
* Bugfixes
- Fixed exec+connect sections.
- Added a workaround for broken Android getaddrinfo():
http://stackoverflow.com/questions/7818246/segmentation-fault-in-getaddrinfo
Version 4.50, 2011.12.03, urgency: MEDIUM:
New features
Added Android port.
Updated INSTALL.FIPS.
Bugfixes
Fixed internal memory allocation problem in inetd mode.
Fixed FIPS mode on Microsoft Vista, Server 2008, and Windows 7. This fix required to compile OpenSSL FIPS-compliant DLLs with MSVC 9.0, instead of MSVC 10.0. msvcr100.dll was replaced with msvcr90.dll. GPL compatibility issues are explained in the GPL FAQ: http://www.gnu.org/licenses/gpl-faq.html#WindowsRuntimeAndGPL
POP3 server-side protocol negotiation updated to report STLS capability (thx to Anthony Morgan).
Version 4.49, 2011.11.28, urgency: MEDIUM:
Bugfixes
Missing Microsoft Visual C++ Redistributable (msvcr100.dll) required by FIPS-compliant OpenSSL library was added to the Windows installer.
A bug was fixed causing crashes on MacOS X and some other platforms.
Version 4.48, 2011.11.26, urgency: MEDIUM:
New features
FIPS support on Win32 platform added. OpenSSL 0.9.8r DLLs based on FIPS 1.2.3 canister are included with this version of stunnel. FIPS mode can be disabled with "fips = no" configuration file option.
Bugfixes
Fixed canary initialization problem on Win32 platform.
Version 4.47, 2011.11.21, urgency: MEDIUM:
Internal improvements
CVE-2010-3864 workaround improved to check runtime version of OpenSSL rather than compiled version, and to allow OpenSSL 0.x.x >= 0.9.8p.
Encoding of man page sources changed to UTF-8.
Bugfixes
Handling of socket/SSL close in transfer() function was fixed.
Logging was modified to save and restore system error codes.
Option "service" was restricted to Unix, as since stunnel 4.42 it wasn't doing anything useful on Windows platform.
Changelog:
Version 4.46, 2011.11.04, urgency: LOW:
* New features
- Added Unix socket support (e.g. "connect = /var/run/stunnel/socket").
- Added "verify = 4" mode to ignore CA chain and only verify peer certificate.
- Removed the limit of 16 IP addresses for a single 'connect' option.
- Removed the limit of 256 stunnel.conf sections in PTHREAD threading model.
It is still not possible have more than 63 sections on WIN32 platform.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms740141(v=vs.85).aspx
* Optimizations
- Reduced per-connection memory usage.
- Performed a major refactoring of internal data structures. Extensive
internal testing was performed, but some regression bugs are expected.
* Bugfixes
- Fixed WIN32 compilation with Mingw32.
- Fixed non-blocking API emulation layer in UCONTEXT threading model.
- Fixed signal handling in UCONTEXT threading model.
set in PKG_SYSCONFDIR variable, so it is passed down to Makefile.
Configuration final path ends up being etc/stunnel/stunnel/stunnel.conf,
which is wrong.
- New features
- New verify level 0 to request and ignore peer certificate. This
feature is useful with the new Windows GUI menu to save cached peer
certificate chains, as SSL client certificates are not sent by default.
- Manual page has been updated.
- Removed support for changing Windows Service name with "service" option.
- Hardcoded 2048-bit DH parameters are used as a fallback if DH parameters
are not provided in stunnel.pem.
- Default "ciphers" value updated to prefer ECDH:
"ALL:!SSLv2:!aNULL:!EXP:!LOW:-MEDIUM:RC4:+HIGH".
- Default ECDH curve updated to "prime256v1".
- Removed support for temporary RSA keys (used in obsolete export ciphers).
- Bugfixes
- The -quiet commandline option was applied to *all* message boxes.
- Silent install (/S option) no longer attempts to create stunnel.pem.
Version 4.39, 2011.07.06, urgency: LOW:
New features
New Win32 installer module to build self-signed stunnel.pem.
Added configuration file editing with Windows GUI.
Added log file reopening file editing with Windows GUI. It might be useful to also implement log file rotation.
Improved configuration file reload with Windows GUI.
Version 4.38, 2011.06.28, urgency: MEDIUM:
New features
Server-side SNI implemented (RFC 3546 section 3.1) with a new service-level option "nsi".
"socket" option also accepts "yes" and "no" for flags.
Nagle's algorithm is now disabled by default for improved interactivity.
Bugfixes
A compilation fix was added for OpenSSL version < 1.0.0.
Signal pipe set to non-blocking mode. This bug caused hangs of stunnel features based on signals, e.g. local mode, FORK threading, or configuration file reload on Unix. Win32 platform was not affected.
Version 4.37, 2011.06.17, urgency: MEDIUM:
New features
Client-side SNI implemented (RFC 3546 section 3.1).
Default "ciphers" changed from the OpenSSL default to a more secure and faster "RC4-MD5:HIGH:!aNULL:!SSLv2". A paranoid (and usually slower) setting would be "HIGH:!aNULL:!SSLv2".
Recommended "options = NO_SSLv2" added to the sample stunnel.conf file.
Default client method upgraded from SSLv3 to TLSv1. To connect servers without TLS support use "sslVersion = SSLv3" option.
Improved --enable-fips and --disable-fips ./configure option handling.
On startup stunnel now compares the compiled version of OpenSSL against the running version of OpenSSL. A warning is logged on mismatch.
Bugfixes
Non-blocking socket handling in local mode fixed (Debian bug #626856).
UCONTEXT threading mode fixed.
Removed the use of gcc Thread-Local Storage for improved portability.
va_copy macro defined for platforms that do not have it.
Fixed "local" option parsing on IPv4 systems.
Solaris compilation fix (redefinition of "STR").
Version 4.36, 2011.05.03, urgency: LOW:
New features
Updated Win32 DLLs for OpenSSL 1.0.0d.
Dynamic memory management for strings manipulation: no more static STRLEN limit, lower stack footprint.
Strict public key comparison added for "verify = 3" certificate checking mode (thx to Philipp Hartwig).
Backlog parameter of listen(2) changed from 5 to SOMAXCONN: improved behavior on heavy load.
Example tools/stunnel.service file added for systemd service manager.
Bugfixes
Missing pthread_attr_destroy() added to fix memory leak (thx to Paul Allex and Peter Pentchev).
Fixed the incorrect way of setting FD_CLOEXEC flag.
Fixed --enable-libwrap option of ./configure script.
/opt/local added to OpenSSL search path for MacPorts compatibility.
Workaround implemented for signal handling on MacOS X.
A trivial bug fixed in the stunnel.init script.
Retry implemented on EAI_AGAIN error returned by resolver calls.
Version 4.35, 2011.02.05, urgency: LOW:
New features
Updated Win32 DLLs for OpenSSL 1.0.0c.
Transparent source (non-local bind) added for FreeBSD 8.x.
Transparent destination ("transparent = destination") added for Linux.
Bugfixes
Fixed reload of FIPS-enabled stunnel.
Compiler options are now auto-detected by ./configure script in order to support obsolete versions of gcc.
Async-signal-unsafe s_log() removed from SIGTERM/SIGQUIT/SIGINT handler.
CLOEXEC file descriptor leaks fixed on Linux >= 2.6.28 with glibc >= 2.10. Irreparable race condition leaks remain on other Unix platforms. This issue may have security implications on some deployments: http://udrepper.livejournal.com/20407.html
Directory lib64 included in the OpenSSL library search path.
Windows CE compilation fixes (thx to Pierre Delaage).
Deprecated RSA_generate_key() replaced with RSA_generate_key_ex().
Domain name changes (courtesy of Bri Hatch)
http://stunnel.mirt.net/ --> http://www.stunnel.org/
ftp://stunnel.mirt.net/ --> http://ftp.stunnel.org/
stunnel.mirt.net::stunnel --> rsync.stunnel.org::stunnel
stunnel-users@mirt.net --> stunnel-users@stunnel.orgstunnel-announce@mirt.net --> stunnel-announce@stunnel.org
Version 4.34, 2010.09.19, urgency: LOW:
New features
Updated Win32 DLLs for OpenSSL 1.0.0a.
Updated Win32 DLLs for zlib 1.2.5.
Updated automake to version 1.11.1
Updated libtool to version 2.2.6b
Added ECC support with a new service-level "curve" option.
DH support is now enabled by default.
Added support for OpenSSL builds with some algorithms disabled.
./configure modified to support cross-compilation.
Sample stunnel.init updated based on Debian init script.
Bugfixes
Implemented fixes in user interface to enter engine PIN.
Fixed a transfer() loop issue on socket errors.
Fixed missing WIN32 taskbar icon while displaying a global option error.
- New features
- New service-level "libwrap" option for run-time control whether
/etc/hosts.allow and /etc/hosts.deny are used for access control.
Disabling libwrap significantly increases performance of stunnel.
- Log file reopen on USR1 signal was added.
- Graceful configuration reload with HUP signal on Unix
and with GUI on Windows.
- Bugfixes
- Inetd mode fixed
- Fixed a transfer() loop issue with SSLv2 connections.
- Fixed a "setsockopt IP_TRANSPARENT" warning with "local" option.
- Logging subsystem bugfixes and cleanup.
- Installer bugfixes for Vista and later versions of Windows.
- FIPS mode can be enabled/disabled at runtime.
Version 4.29, 2009.12.02, urgency: MEDIUM:
* New features sponsored by Searchtech Limited http://www.astraweb.com/
- sessiond, a high performance SSL session cache was built for stunnel.
A new service-level "sessiond" option was added. sessiond is
available for download on ftp://stunnel.mirt.net/stunnel/sessiond/ .
stunnel clusters will be a lot faster, now!
* Bugfixes
- "execargs" defaults to the "exec" parameter (thx to Peter Pentchev).
- Compilation fixes added for AIX and old versions of OpenSSL.
- Missing "fips" option was added to the manual.
Version 4.28, 2009.11.08, urgency: MEDIUM:
* New features
- Win32 DLLs for OpenSSL 0.9.8l.
- Transparent proxy support on Linux kernels >=2.6.28.
See the manual for details.
- New socket options to control TCP keepalive on Linux:
TCP_KEEPCNT, TCP_KEEPIDLE, TCP_KEEPINTVL.
- SSL options updated for the recent version of OpenSSL library.
* Bugfixes
- A serious bug in asynchronous shutdown code fixed.
- Data alignment updated in libwrap.c.
- Polish manual encoding fixed.
- Notes on compression implementation in OpenSSL added to the manual.
- New features
- FIPS support was updated for openssl-fips 1.2.
- New priority failover strategy for multiple "connect" targets,
controlled with "failover=rr" (default) or "failover=prio".
- pgsql protocol negotiation by Marko Kreen <markokr@gmail.com>.
- Bugfixes
- Libwrap helper processes fixed to close standard
input/output/error file descriptors.
* libwrap related fixes, better debugging messages, MS Visual C++ support
Changes 4.25:
* delay libwrap process spawning after dropping privs, other improvements
4.24: fix security problem (properly reject revoked certs)
4.23: WinNT bugfix
4.22:
- A new global option to control logging to syslog.
Simultaneous logging to a file and the syslog is now possible.
- A new service level option to control stack size.
- Restored chroot() to be executed after decoding numerical
userid and groupid values in drop_privileges().
- A few bugs fixed the in the new libwrap support code.
- TLSv1 method used by default in FIPS mode instead of
SSLv3 client and SSLv23 server methods.
4.21:
- Initial FIPS 140-2 support (see INSTALL.FIPS for details).
- Experimental fast support for non-MT-safe libwrap is provided
with pre-spawned processes.
- Stunnel binary moved from /usr/local/sbin to /usr/local/bin
in order to meet FHS and LSB requirements.
- Added code to disallow compiling stunnel with pthreads when
OpenSSL is compiled without threads support.
- Minor manual update.
- TODO file updated.
- Dynamic locking callbacks added (needed by some engines to work).
- AC_ARG_ENABLE fixed in configure.am to accept yes/no arguments.
- On some systems libwrap requires yp_get_default_domain from libnsl,
additional checking for libnsl was added to the ./configure script.
- Sending a list of trusted CAs for the client to choose the right
certificate restored.
- Some compatibility issues with NTLM authentication fixed.
Version 4.20, 2006.11.30, urgency: MEDIUM:
* Release notes
- The new transfer() function has been well tested.
I recommend upgrading any previous version with this one.
* Bugfixes
- Fixed support for encrypted passphases (broken in 4.19).
- Reduced amount of debug logs.
- A minor man page update.
Version 4.19, 2006.11.11, urgency: LOW/EXPERIMENTAL:
* Release notes
- There are a lot of new features in this version. I recommend
to test it well before upgrading your mission-critical systems.
* New features
- New service-level option to specify OCSP server flag:
OCSPflag = <flag>
- "protocolCredentials" option changed to "protocolUsername"
and "protocolPassword"
- NTLM support to be enabled with the new service-level option:
protocolAuthentication = NTLM
- imap protocol negotiation support added.
- Passphrase cache was added so the user does not need to reenter
the same passphrase for each defined service any more.
- New service-level option to retry connect+exec section:
retry = yes|no
- Local IP and port is logged for each established connection.
- Win32 DLLs for OpenSSL 0.9.8d.
* Bugfixes
- Serious problem with SSL_WANT_* retries fixed.
The new code requires extensive testing!
Version 4.18, 2006.09.26, urgency: MEDIUM:
* Bugfixes
- GPF on entering private key pass phrase on Win32 fixed.
- Updated OpenSSL Win32 DLLs.
- Minor configure script update.
Version 4.17, 2006.09.10, urgency: MEDIUM:
* New features
- Win32 DLLs for OpenSSL 0.9.8c.
* Bugfixes
- Problem with detecting getaddrinfo() in ./configure fixed.
- Compilation problem due to misplaced #endif in ssl.c fixed.
- Duplicate 220 in smtp_server() function in protocol.c fixed.
- Minor os2.mak update.
- Minor update of safestring()/safename() macros.
Version 4.16, 2006.08.31, urgency: MEDIUM:
* New features sponsored by Hewlett-Packard
- A new global option to control engine:
engineCtrl = <command>[:<parameter>]
- A new service-level option to select engine to read private key:
engineNum = <engine number>
- OCSP support:
ocsp = <URL>
* New features
- A new option to select version of SSL protocol:
sslVersion = all|SSLv2|SSLv3|TLSv1
- Visual Studio vc.mak by David Gillingham <dgillingham@gmail.com>.
- OS2 support by Paul Smedley (http://smedley.info)
* Bugfixes
- An ordinary user can install stunnel again.
- Compilation problem with --enable-dh fixed.
- Some minor compilation warnings fixed.
- Service-level CRL cert store implemented.
- GPF on protocol negotiations fixed.
- Problem detecting addrinfo() on Tru64 fixed.
- Default group is now detected by configure script.
- Check for maximum number of defined services added.
- OpenSSL_add_all_algorithms() added to SSL initialization.
- configure script sections reordered to detect pthread library funcions.
- RFC 2487 autdoetection improved. High resolution s_poll_wait()
not currently supported by UCONTEXT threading.
- More precise description of cert directory file names (thx to Muhammad
Muquit).
* Other changes
- Maximum number of services increased from 64 to 256 when poll() is used.
(PKG_SYSCONFDIR already includes "stunnel" by default, so avoid the
package adding another and making $PREFIX/etc/stunnel/stunnel/stunnel.conf;
the pidfile does not normally belong under $PREFIX as $PREFIX/var/run is
not normally cleaned/checked by OS-supplied processes.)
Version 4.07, 2005.01.03, urgency: MEDIUM:
* Bugfixes
- Problem with infinite poll() timeout negative, but not equal to -1 fixed.
- Problem with a file descriptor ready to be read just after a non-blocking
connect call fixed.
- Compile error with EAI_NODATA not defined or equal to EAI_NONAME fixed.
- IP address and TCP port textual representation length (IPLEN) increased
to 128 bytes.
- OpenSSL engine support is only used if engine.h header file exists.
Version 4.06, 2004.12.26, urgency: LOW:
* New feature sponsored by SURFnet http://www.surfnet.nl/
- IPv6 support (to be enabled with ./configure --enable-ipv6).
* New features
- poll() support - no more FD_SETSIZE limit!
- Multiple connect=host:port options are allowed in a single service
section. Remote hosts are connected using round-robin algorithm.
This feature is not compatible with delayed resolver.
- New 'compression' option to enable compression. To use zlib
algorithm you have to enable it when building OpenSSL library.
- New 'engine' option to select a hardware engine.
- New 'TIMEOUTconnect' option with 10 seconds default added.
- stunnel3 perl script to emulate version 3.x command line options.
- French manual updated by Bernard Choppy <choppy AT free POINT fr>.
- A watchdog to detect transfer() infinite loops added.
- Configuration file comment character changed from '#' to ';'.
'#' will still be recognized to keep compatibility.
- MT-safe getaddrinfo() and getnameinfo() are used where available
to get better performance on resolver calls.
- Automake upgraded from 1.4-p4 to 1.7.9.
* Bugfixes
- log() changed to s_log() to avoid conflicts on some systems.
- Common CRIT_INET critical section introduced instead of separate
CRIT_NTOA and CRIT_RESOLVER to avoid potential problems with
libwrap (TCP Wrappers) library.
- CreateThread() finally replaced with _beginthread() on Win32.
- make install creates $(localstatedir)/stunnel.
$(localstatedir)/stunnel/dev/zero is also created on Solaris.
- Race condition with client session cache fixed.
- Other minor bugfixes.
* Release notes
- Default is *not* to use IPv6 '::' for accept and '::1' for
connect. For example to accept pop3s on IPv6 you could use:
'accept = :::995'. I hope the new syntax is clear enough.
* New feature sponsored by SURFnet http://www.surfnet.nl/
- Support for CIFS aka SMB protocol SSL negotiation.
* New features
- CRL support with new CApath and CAfile global options.
- New 'taskbar' option on WIN32 (thx to Ken Mattsen
<ken.Mattsen@roxio.com>).
- New -fd command line parameter to read configuration
from a specified file descriptor instead of a file.
- accept is reported as error with [section] defined (in
stunnel 4.04 it was silently ignored causing problems
for lusers that did not read the fine manual).
- Use fcntl() instead of ioctlsocket() to set socket
nonblocking when it is supported.
- Basic support for hardware engines with OpenSSL >= 0.9.7.
- French manual by Bernard Choppy <choppy@imaginet.fr>.
- Thread stack size reduced to 64KB for maximum scalability.
- Added optional code to debug thread stack usage.
- Support for nsr-tandem-nsk (thx to Tom Bates <tom.bates@hp.com>).
* Bugfixes
- TCP wrappers code moved to CRIT_NTOA critical section
since it uses static inet_ntoa() result buffer.
- SSL_ERROR_SYSCALL handling problems fixed.
- added code to retry nonblocking SSL_shutdown() calls.
- Use FD_SETSIZE instead of 16 file descriptors in inetd
mode.
- fdscanf groks lowercase protocol negotiation commands.
- WIN32 taskbar GDI objects leak fixed.
- Libwrap detection bug in ./configure script fixed.
- grp.h header detection fixed for NetBSD and possibly
other systems.
- Some other minor updates.
* New features sponsored by MAXIMUS http://www.maximus.com/
- New 'options' configuration option to setup
OpenSSL library hacks with SSL_CTX_set_options().
- 'service' option also changes the name for
TCP Wrappers access control in inetd mode.
- SSL is negotiated before connecting remote host
or spawning local process whenever possible.
- REMOTE_HOST variable is always placed in the
enrivonment of a process spawned with 'exec'.
- Whole SSL error stack is dumped on errors.
- Manual page updated (special thanks to Brian Hatch).
- New user interface (config file).
- Single daemon can listen on multiple ports, now.
- Delayed DNS lookup added.
* Other new features
- All the timeouts are now configurable including
TIMEOUTclose that can be set to 0 for MSIE and other
buggy clients that do not send close_notify.
- Stunnel process can be chrooted in a specified directory.
- Numerical values for setuid() and setgid() are allowed, now.
- Confusing code for setting certificate defaults introduced in
version 3.8p3 was removed to simplify stunnel setup.
There are no built-in defaults for CApath and CAfile options.
- Private key file for a certificate can be kept in a separate
file. Default remains to keep it in the cert file.
- Manual page updated.
- Format string bug fixed in protocol.c
smtp, pop3 and nntp in client mode were affected.
(stunnel clients could be attacked by malicious servers)
- Certificate chain can be supplied with -p option or in stunnel.pem.
- Problem with -r and -l options used together fixed.
- memmove() instead of memcpy() is used to move data in buffers.
- More detailed information about negotiated ciphers is printed.
- New ./configure options: "--enable-no-rsa" and "--enable-dh".
Changelog for version 3.21c, 2001.11.11, urgency: LOW:
* autoconf scripts upgraded to version 2.52.
* Problem with pthread_sigmask on Darwin fixed (I hope).
* Some documentation typos corrected.
* Attempt to ignore EINTR in transfer().
* Shared library version reported on startup.
* DLLs for OpenSSL 0.9.6b.
* Problem with errno and posix threads fixed.
* It is assumed that system has getopt() if it has getopt.h header file.
* SSL_CLIENT_DN and SSL_CLIENT_I_DN environment variables set in local mode
(-l) process. This feature doesn't work if
client mode (-c) or protocol negotiation (-n) is used.
* Winsock error descriptions hardcoded (English version only).
* SetConsoleCtrlHandler() used to handle CTRL+C, logoff and shutdown on Win32.
* Stunnel always requests peer certificate with -v 0.
* sysconf()/getrlimit() used to calculate number of clients allowed.
* SSL mode changed for OpenSSL >= 0.9.6.
* close-on-exec option used to avoid socket inheriting.
* Buffer size increased from 8KB to 16KB.
* fdscanf()/fdprintf() changes:
- non-blocking socket support,
- timeout after 1 minute of inactivity.
* auth_user() redesigned to force 1 minute timeout.
* Some source arrangement towards 4.x architecture.
* No need for "goto" any more.
* New Makefile "test" rule. It performs basic test of
standalone/inetd, remote/local and server/client mode.
* pop3 server mode support added.
Changelog for version 3.20, 2001.08.15, urgency: LOW:
* setsockopt() optlen set according to the optval for Solaris.
* Minor NetBSD compatibility fixes by Martti Kuparinen.
* Minor MSVC6 compatibility fixes by Patrick Mayweg.
* SSL close_notify timeout reduced to 10 seconds of inactivity.
* Socket close instead of reset on close_notify timeout.
* Some source arrangement and minor bugfixes.
Based on PR pkg/13679 by Martti Kuparinen.
Changelog for version 3.19, 2001.08.10, urgency: MEDIUM:
* Critical section added around non MT-safe TCP Wrappers code.
* Problem with "select: Interrupted system call" error fixed.
* errno replaced with get_last_socket_error() for Win32.
* Some FreeBSD/NetBSD patches to ./configure from Martti Kuparinen.
* Local mode process pid logged.
* Default FQDN (localhost) removed from stunnel.cnf
* ./configure changed to recognize POSIX threads library on OSF.
* New -O option to set socket options.
Changes:
* Some transfer() bugfixes/improvements.
* STDIN/STDOUT are no logner assumed to be non-socket decriptors.
* Problem with --with-tcp-wrappers patch fixed.
* pop3 and nntp support bug fixed by Martin Germann.
* -o option to append log messages to a file added.
* Changed error message for SSL error 0.
Provided by Martti Kuparinen in PR 13537.
Based on a pkg provided by Martti Kuparinen in PR 13484.
Changes include:
* Serious bug resulting in random transfer() hangs fixed.
* Separate file descriptors are used for inetd mode.
* -f (foreground) logs are now stamped with time.
* New ./configure option: --with-tcp-wrappers by Brian Hatch.
* pop3 protocol client support (-n pop3) by Martin Germann.
* nntp protocol client support (-n nntp) by Martin Germann.
* RFC 2487 (smtp STARTTLS) client mode support.
* Transparency support for Tru64 added.
* Some #includes for AIX added.
